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Preparation method of cellulose-based water absorbent material

A water-absorbing material, cellulose-based technology, applied in the field of preparation of cellulose-based water-absorbing materials, can solve the problems of difficult measurement, fast water absorption rate, data fluctuation, etc.

Inactive Publication Date: 2013-07-17
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are some problems in the research of most superabsorbent materials: (1) the salt tolerance of ionic superabsorbent materials is not good; Good, but its water absorption performance is poor
However, due to the instability of the reverse-phase suspension polymerization system, it has disadvantages such as measurement difficulties, data fluctuations, and a great impression on the processing conclusions, resulting in immature theory and technology, thus limiting its application.
Homogeneous graft polymerization needs to find a solvent that can effectively dissolve cellulose, but the price of the currently studied cellulose solvent system is generally high, and the recovery is difficult, which also limits the application of this method

Method used

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  • Preparation method of cellulose-based water absorbent material
  • Preparation method of cellulose-based water absorbent material
  • Preparation method of cellulose-based water absorbent material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Natural cassava stalks, corn stalks, cotton stalks, buckwheat stalks, and eucalyptus cellulose were used as raw materials respectively, and after being pulverized by a pulverizer, fiber materials between 40 and 60 mesh sieves were taken, washed three times with distilled water at room temperature, and then washed with volume Wash twice with 80% ethanol, and dry at 60°C for 10 hours. Take 5g of the above-mentioned treated cellulose and place it in a low-temperature plasma reaction chamber for treatment. The plasma treatment conditions are discharge voltage 150V, vacuum degree 1500Pa, and discharge time 120s. Configure 100mL of monomer solution with a mass concentration of 20%, and then take 2.5g of the above-mentioned treated cellulose in the monomer solution at a ratio of 8:1 by monomer to cellulose mass ratio, wherein the monomer solution is made of acrylic acid It is formulated by mixing with acrylamide at a mass ratio of 1:1. The degree of neutralization of acrylic a...

Embodiment 2

[0044] The bagasse fiber is used as raw material, after being pulverized by a pulverizer, the fiber material with a 40-60 mesh sieve is taken, washed three times with distilled water at room temperature, then washed twice with ethanol with a volume concentration of 80%, and dried at 60°C 10h. Take 5g of the above-mentioned processed bagasse cellulose for processing in a low-temperature plasma reaction chamber. The plasma processing conditions are discharge voltage 50V, vacuum degree 1000Pa, and discharge time 30s. Configure 100mL of monomer solution with a mass concentration of 50%, and then take 12.5g of the above-mentioned treated cellulose in the monomer solution at a ratio of 4:1 by monomer and cellulose mass ratio, wherein the monomer solution is made of propylene Nitrile or acrylic acid or acrylamide with a neutralization degree of 80% or acrylic acid and acrylamide with a neutralization degree of 80% are mixed and prepared at a mass ratio of 2:1, and then the initiator ...

Embodiment 3

[0049] Poplar fiber is used as raw material, after being pulverized by a pulverizer, the fiber material with a 40-60 mesh sieve is taken, washed three times with distilled water at room temperature, washed twice with ethanol with a volume concentration of 80%, and dried at 60°C Dry for 10 hours. 6 parts of 5 g of the treated poplar wood cellulose were respectively taken and placed in a low-temperature plasma reaction chamber for treatment. The plasma treatment conditions were discharge voltage 100 V, vacuum degree 800 Pa, and discharge time 250 s. Configure 6 parts of 100mL monomer solutions with a mass concentration of 10.08% respectively, and then take 1.12 g of the above-mentioned treated cellulose in each part of the monomer solution at a ratio of 9:1 by monomer to cellulose mass ratio. The body solution is prepared by mixing methacrylic acid and methacrylamide at a mass ratio of 2:1, and then adding 6 parts of monomers and cellulose to the mixed solution according to the ...

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Abstract

The invention discloses a preparation method of a cellulose-based water absorbent material. The method comprises the main operation steps: grinding a natural cellulose material, washing with distilled water and ethanol, and drying; performing low-temperature plasma treatment on the conditions that the treatment voltage is 50-210V, the vacuum degree is 800-1500Pa and the discharge time is 30-250s;and then placing cellulose in a 10-50wt% monomer solution, then adding an initiator and a crosslinking agent in the mixed solution of monomer and cellulose, injecting nitrogen for protection, performing a graft copolymerization reaction at 40-80 DEG C for 10-40min, and then drying to obtain the cellulose-based water absorbent material. The prepared cellulose-based water absorbent material can be used in disposable diapers for babies, sanitary towels, napkins, handkerchiefs, bandages, absorbent cotton, operation liners and the like; and by utilizing the slow release effect of resin, the material can be used as a carrier material of the scenting agent and the deodorant to realize the effects of deodorizing.

Description

technical field [0001] The invention relates to a water-absorbing material, in particular to a preparation method of a cellulose-based water-absorbing material. Background technique [0002] At present, the demand for superabsorbent materials in the market is increasing, because it has a wide range of applications in various fields such as personal hygiene products, industrial and agricultural production, and civil engineering. However, there are some problems in the research of most superabsorbent materials: (1) the salt tolerance of ionic superabsorbent materials is not good; Good, but its water absorption performance is poor. In various practical applications, the water-absorbing agent is often required to have certain salt resistance and gel strength. Therefore, there is a need to develop a high-performance water-absorbing material in the market. High-performance water-absorbing materials not only have excellent water absorption and water retention properties, but als...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/02C08F220/06C08F220/56C08F2/52C08F4/40
Inventor 朱红祥夏南南何辉穆英啸覃程荣周敬红宋雪萍王双飞邓超冰王英辉
Owner GUANGXI UNIV
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